Agricultural Science JAMB, WAEC, NECO AND NABTEB Official Past Questions

Study specimens V (EARTH WORM), W (PADDY RICE), X (GROUNDNUT SEEDS) and Y (MAIZE STEM BORER) carefully and answer the following questions.

(a) State four ways in which specimen V is important in Agriculture.

(b) Outline the steps involved in processing each of specimens W and X into polished rice and groundnut cake respectively.

(c) Mention three measures used in controlling specimen Y on a farm

Study specimens P ( Electric bulb) , Q (Garden fork), R (Hand trowel ) and S (knapsack sprayer) carefully and answer the following questions.

(a) State two uses each of specimens P, Q, and R.

(b) Mention three problems that may result from a poorly maintained specimen S.

(c) List three protective devices that should be worn by a farmer when using specimen S.

(d) State three precautions that should be taken when using specimens S.

Study specimens G (GOAT WEED), H (SIDA WEED), I (SPEAR GRASS), J (ELEPHANT GRASS), and K (PIG WEED) carefully and answer the following questions.

(a) State the botanical names of each of specimens G,H, I, J, and K.

(b) Give one reason why each of specimens 1, J, and K is difficult to control.

(c) Mention two uses of specimen J.

(d) State five ways in which specimens G, H, I, J, and K are of economic importance to farmers.

Study specimens A (BONE), B (HORN), C (HOOF), D (WATER) and E (COWPEA) carefully and answer the following questions

(a)(i) State one major feed nutrient in each of specimens A and E

(ii) Mention three economic uses each of Specirnens A, B, and C

(b)(i) State two functions of specimen D in farm animals

(ii) Highlight two benefits that a farmer would derive if specimen E if included in a crop rotation program.

(a) State four reasons why the prices of most agricultural produce are unstable in West
Africa. [ 4 marks ]

(b) Explain the following agricultural extension methods:
(i) method demonstration;
(ii) agricultural shows. [ 4 marks ]

(c) Discuss the cercospora leaf spot disease under the following headings:
(i) crop affected;
(ii) causative agent;
(iii) mode of transmission;
(iv) two symptoms;
(v) one preventive measure. [ 6 marks ]

(d) State four advantages of selection as a method of crop improvement. [ 4 marks ]

(a) Mention three functions of a farm manager. [ 3 marks ]
(b) Use the information in the demand schedule below to answer the questions that follow.

(i) Draw a demand curve from the schedule [ 4 marks ]
(ii) Use the demand schedule to explain the relationship between quantity demanded
and price. [ 2 marks ]

(c) State three advantages of the wholesaler in marketing of agricultural produce.
[ 3 marks ]

(d) Discuss the rinderpest disease under the following headings:
(i) two farm animals affected;
(ii) causative agent;
(iii) two symptoms;
(iv) one mode of transmission;
(v) one preventive measure. [ 6 marks ]

(a) In an incubator, 1,500 eggs were arranged on the trays for incubation. During candling, 25 eggs were discovered to be unfertilized. At hatching, 475 chicks were male and the remaining were female. Calculate the percentage of:
(i) unfertilized eggs;
(ii) fertilized eggs;
(iii) male chicks;
(iv) female chicks. [ 6 marks]

(b) State four signs that indicate the approach of parturition in a cow. [ 4 marks ]

(c) Mention four vegetative materials that could be used in propagating ornamental
plants. [ 4 marks ]

(d) State four advantages of grafting. [ 4 marks ]

(a) Describe the cultivation of Cowpea under the headings:

(i) soil requirement;
(ii) method of propagation;
(iii) spacing [ 3 marks ]

(b) Name one disease and two field pests of Cowpea. [ 3 marks ]

(c) State four cultural methods of controlling crop pests. [ 4 marks ]

(d) State four human activities that promote deforestation in West Africa. [ 4 marks ]

(e) Describe each of the following agro-forestry practices:

(i) alley cropping;
(ii) ley farming. [ 4 marks ]

(a) State two advantages and two disadvantages of using biogas as a source of farm power. [ 4 marks ]

(b) Mention eight simple farm tools. [ 4 marks ]

(c) List two common storage structures and two processing structures that could be found on a farmstead in West Africa. [ 4 marks ]

(d) Explain the term denitrification. [ 2 marks ]

(e) Describe the following components of the soil:
(i) mineral matter;
(ii) organic matter. [ 4 marks ]

(a) Differentiate between land ownership by leasehold and land ownership by freehold. [ 2 marks ]

(b) Mention five ways in which non-governmental organizations contribute to agricultural
development in West Africa. [ 5 marks ]

(c) State four ways in which rural-urban migration has hindered agricultural development in West Africa. [ 4 marks ]

(d) Mention three socio-economic uses of land. [ 3 marks ]

(e) Explain two ways by which each of the following environmental factors affect agricultural production:

1. Soil organisms;
2. soil texture. [ 4 marks ]

The annual depreciation of the implement is

A farmer bought a farm implement for 12,500 in 2007 . At the end of the fourth year he sold if for #4,300. Use information to answer question

Calculate the total depreciation of the implement

Sexual propagation involves the use of

Which of the following developments could result from defoiratation?

The effect of fertilizing a fish pond with compost manure on phytoplankton population and fish yield is such that

The term fingerling refers to a young

The term fingerling refers to a young

The term fingerling refers to a young

Which of the following methods is inapropriate when introducing a new variety of rice farmers?

A farmer obtained a of #250,000 at a simple interest rate of 8% per annum to be paid in two years what would be the interest the farmer will pay on the loan?

The demand for cassava is not affected by